Method of making adjustable bearings.



No. 827,135. .PATENTBD JULY 31, 1906.

I F. WOLFSJAGER; METHOD OF MAKING ADJUSTABLE BEARINGS APPLIQATION FILEDJune, 1905.

A WORN E Y5.

1H: NORRIS PETERS 00., WASHINGTON, n c.

FRANKWOLESJ'AGER, OF MILWA KEE, WI N No. 827,135. f

- Specification of Letters Patent.

" Application filecl'July 26, 1905. $erial No. 271,280.

ETHoo joF MAKING ADJUSTABLE BEARINGS.

l'atentecl July 31, 1906.

T0 at whmn it may concern.-

.Be it known that I, FRANK WOLFSJAGER, a citizen of the United States,residing at Milwaukee, county of Milwaukee, and State of Wisconsin, haveinvented new and useful Improvements in Methods of Making AdjustableBearings, ofwhich the following is a specification. 1

. My invention relates toimprovements in methods of making adjustablebearings. Heretofore the bearing-heads ofthis kind have been cast andthe shaft or crank-pin apertures completed by machine-work and thewallsthereof cut out on one side to form a recess for the adjustableblock, which was separately formed and fitted to such recess. The wallsof the recess and of the adjustable block had to be carefully finishedand the block nicely fitted in position.

The object of the present invention is to provide means whereby theadjustable block is fitted to the bearing-head in the process of castingand the aperture for the shaft or crank-pin is formed with an ordinarydrill, no other finishing-work being'required.

In the following description reference is had to the accompanyingdrawings, in which Figure 1 is aview of the adjustable bearingblock asit is formed preparatory to the casting operation. Fig. 2 is a plan-viewof one part of the mold with the block in position therein. Fig. 3 is aside view of a bearinghead as taken from the mold and designed for useon a pitman-rod. Fig. 4 is a view of the same completed'and ready foruse.

block A in position.

Like parts are identified by the same reference views. 7

In the practice of my method the adjustable blocks A are-castseparately. A mold is characters throughout the several then preparedfor casting the bearing-head,

and one of the blocks A is inserted at the side of the core which formsthe shaft or crankpin aperture, as illustrated in Fig. 2. Molten metalis then flowed into the mold and around the outer wall of the part A,the bearing-head being thus cast with the adjustable The block A,especially where large castings are to be made, should be coated withgraphite or other suitable material to prevent the molten metal fromfusing with the surface of the adjustable block. As the molten metalcools it shrinks and binds upon the adjustable block with con siderableforce, thus holding the block in po- ,i.ng-screw D, the inner end beloosenedby operation of the drill and will not vibratewhen the bearingis in use.

When the casting B is removed from the mold, the crank-pin orshaft-aperture C is drilled out cylindrically, and as the .concave faceof the block A forms a portion of this aperture it is obvious that thedrill will finish this surface of the block and the op osing Wall of thecasting simultaneously. A hole is then drilled-in the end of the castingfor an adjustof which bears against the block A, whereby the block maybe pushed inwardly from time to time by turning the screw to take up thewear of the shaft in the bearing.

It will of course be understood that the side walls of the block Ashould be parallel and shouldbe separated from each other at a distanceequal to the diameter of the shaft or crank-pin aperture in order thatthe block will not become loosened when moved inwardly to take up thewear. The drill not only forms the aperture for .the "shaft or,

crank-pin, but releases the block by. enlargingthe aperture to adiameter equal to that of the block, all the finishing required for theblock being performed by the drill in the operation of boring out theaperture.

While I have shown and described my invention as practiced in making andfitting adjustable blocks to the heads of connectingrods, it will beunderstood that the same process may be employed in any case'wheresimilar adjustable blocks are used without departing from the scope ofmy invention.

It will of course be understood that in small castings it is notnecessary to use a core to facilitate forming the shaft-aperture. Ifdesired, the shaft-aperture may be drilled from a solid casting, inWhich case the drill Will be so adjusted as to form the aperturealongone face of the block A. I

Having thus described my invention, what I claim as new, and desire tosecure by Let ters Patent, is

1. The method of forming adjustable bearings, consisting first, informing a metallic block having parallel side walls; second, adjustingsaid block in a mold and casting a bearing-head thereon; and third,drilling an aperture along one wall of said block between the parallelside walls of suificient size to release the block and permit itsadjustment in the direction of said aperture.

2. The method of forming adjustable bear-- sition with great stability,so that it will not IIO ings, consisting, first, in forming abearingblock; second, coating'said block with material adapted toprevent fusion with molten metal; third, adjusting said block in a mold5 with one wall abutting a core adapted to pro- 10 moving the casting,with the block thereon,

and then removing the core and drilling out said aperture to thediameter of the block to simultaneously finish the surface of thecasting and block, and also to release the block on the side of theopening.

In testimony whereof I affix my signature in the presence of twowitnesses.

FRANK WOLFSJAGER. I

Witnesses:

JAs. B. ERWIN, O. R. ERWIN.

